Keynote is definitely the bright spot of the iWork suite of apps. The iPad version won't exactly be confused with Powerpoint or the desktop version of Keynote, but of all the iWork apps, it comes the closest, and even for hardcore business users, many will find it does everything they need in a presentation app. The latest update to Keynote really brought the feature set up and aligned the templates with the desktop version, so sharing presentations between your iPad and desktop is easier than ever.
House flies eat things such as decaying matter and feces. They also feed on garbage, spoiled meat and rotting fruits.
Some lay eggs on dead things and their larvae eat the dead stuff as part of the decomposition of organic matter back to the essential nutrients and elements the ecosystem. Still others are predators, eating other insects (robber flies are cool predators, as long as they stay away from my beehives!). Some function as algae eaters in aquatic systems while they are larvae, but after they pupate and emerge as adults, some of these species do not eat and die in a day or so after laying eggs.